.page-about {
  background: var(--c-dark);
  color: var(--c-gray);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* 首屏画册标题区 */
.page-about .ab-hero {
  padding: 56px 0 0;
  position: relative;
}

.page-about .ab-hero__body {
  padding-left: clamp(4px, 7vw, 112px);
}

.page-about .ab-hero::after {
  content: "";
  display: block;
  height: 8px;
  margin-top: 64px;
  background: linear-gradient(105deg, transparent 0%, transparent 20%, var(--c-green) 20%, var(--c-green) 27%, transparent 27%, transparent 64%, var(--c-yellow) 64%, var(--c-yellow) 70%, transparent 70%, transparent 100%);
}

.page-about .ab-breadcrumb {
  margin-bottom: 40px;
}

.page-about .ab-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--c-light-green);
  border: 1px solid var(--c-deep-green);
  padding: 8px 14px;
  margin-bottom: 24px;
}

.page-about .ab-hero__tag-dot {
  width: 8px;
  height: 8px;
  background: var(--c-yellow);
  display: inline-block;
  transform: rotate(45deg);
}

.page-about .ab-hero__title {
  font-family: var(--font-head);
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: .015em;
  color: var(--c-pale);
  max-width: 14em;
  margin: 0 0 22px;
}

.page-about .ab-hero__desc {
  font-size: 15px;
  line-height: 1.85;
  max-width: 46em;
  margin: 0;
}

.page-about .ab-hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 40px;
  max-width: 46em;
}

.page-about .ab-hero-meta-item {
  border-left: 3px solid var(--c-green);
  padding-left: 14px;
}

.page-about .ab-hero-meta-item:last-child {
  border-left-color: var(--c-yellow);
}

.page-about .ab-hero-meta-item dt,
.page-about .ab-hero-meta-item dd {
  margin: 0;
}

.page-about .ab-hero-meta-item__dt {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-gray);
}

.page-about .ab-hero-meta-item__dd {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-green);
  margin-top: 8px;
}

.page-about .ab-hero-meta-item:last-child .ab-hero-meta-item__dd {
  color: var(--c-yellow);
}

/* 章节通用 */
.page-about .ab-chapter {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--c-yellow);
  margin: 0 0 14px;
}

.page-about .ab-chapter::before {
  content: "";
  width: 30px;
  height: 2px;
  background: var(--c-green);
  flex: 0 0 auto;
}

.page-about .ab-chapter__title {
  font-family: var(--font-head);
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.14;
  color: var(--c-pale);
  margin: 0 0 16px;
}

.page-about .ab-section-head {
  max-width: 760px;
}

/* 品牌故事 */
.page-about .ab-story {
  padding: 76px 0 56px;
}

.page-about .ab-story__grid {
  display: grid;
  gap: 48px;
  align-items: start;
}

.page-about .ab-story__media {
  position: relative;
  margin: 12px;
}

.page-about .ab-story__media::before {
  content: "";
  position: absolute;
  left: -12px;
  top: -12px;
  width: 56px;
  height: 56px;
  border-left: 3px solid var(--c-green);
  border-top: 3px solid var(--c-green);
  z-index: 2;
}

.page-about .ab-story__media::after {
  content: "";
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 56px;
  height: 56px;
  border-right: 3px solid var(--c-yellow);
  border-bottom: 3px solid var(--c-yellow);
  z-index: 2;
}

.page-about .ab-story__img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid rgba(0, 196, 90, .35);
  background: var(--c-dark-gray);
}

.page-about .ab-story__text {
  font-size: 15px;
  line-height: 1.9;
  margin: 0 0 16px;
}

.page-about .ab-story__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 36px;
}

.page-about .ab-fact {
  background: var(--c-dark-gray);
  border: 1px solid rgba(0, 196, 90, .25);
  padding: 18px 12px;
  text-align: center;
  transition: border-color .25s ease, background .25s ease;
}

.page-about .ab-fact:hover {
  border-color: var(--c-green);
  background: rgba(0, 196, 90, .08);
}

.page-about .ab-fact__num {
  display: block;
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  color: var(--c-green);
}

.page-about .ab-fact__label {
  display: block;
  font-size: 12px;
  color: var(--c-gray);
  margin-top: 10px;
  letter-spacing: .08em;
}

/* 发展历程 */
.page-about .ab-timeline-section {
  padding: 72px 0;
  background-image: linear-gradient(rgba(0, 196, 90, .055) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 196, 90, .055) 1px, transparent 1px);
  background-size: 36px 36px;
  border-top: 1px solid rgba(0, 196, 90, .2);
  border-bottom: 1px solid rgba(0, 196, 90, .2);
}

.page-about .ab-timeline-wrap {
  margin-top: 44px;
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 44px 52px;
}

.page-about .ab-timeline__item:last-child {
  padding-bottom: 8px;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: -6px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-green) 0%, var(--c-deep-green) 70%);
}

.page-about .ab-timeline__item:last-child::before {
  display: none;
}

.page-about .ab-timeline__marker {
  position: absolute;
  left: 0;
  top: 8px;
  width: 24px;
  height: 24px;
  background: var(--c-dark);
  border: 3px solid var(--c-green);
  transform: rotate(45deg);
  transition: transform .3s ease, background .3s ease, border-color .3s ease;
  z-index: 1;
}

.page-about .ab-timeline__item:hover .ab-timeline__marker,
.page-about .ab-timeline__item:focus-within .ab-timeline__marker {
  transform: rotate(45deg) scale(1.22);
  background: var(--c-yellow);
  border-color: var(--c-yellow);
}

.page-about .ab-timeline__meta {
  background: var(--c-dark-gray);
  border: 1px solid rgba(0, 196, 90, .22);
  padding: 22px;
  transition: border-color .3s ease, background .3s ease, transform .3s ease;
}

.page-about .ab-timeline__item:hover .ab-timeline__meta,
.page-about .ab-timeline__item:focus-within .ab-timeline__meta {
  border-color: var(--c-yellow);
  background: rgba(0, 196, 90, .07);
  transform: translateX(4px);
}

.page-about .ab-timeline__year {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--c-green);
  margin-bottom: 10px;
  letter-spacing: .1em;
}

.page-about .ab-timeline__item:hover .ab-timeline__year,
.page-about .ab-timeline__item:focus-within .ab-timeline__year {
  color: var(--c-yellow);
}

.page-about .ab-timeline__heading {
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.3;
  color: var(--c-pale);
  margin: 0 0 10px;
}

.page-about .ab-timeline__desc {
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
}

.page-about .ab-timeline-figure {
  margin: 12px 0 0;
  padding: 0;
}

.page-about .ab-timeline-figure__img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--c-deep-green);
  padding: 8px;
  background: rgba(37, 45, 37, .7);
  box-sizing: border-box;
}

.page-about .ab-timeline-figure__cap {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-gray);
  text-align: right;
  margin-top: 10px;
  letter-spacing: .06em;
}

/* 数据能力 */
.page-about .ab-capability {
  padding: 76px 0;
  background: linear-gradient(115deg, transparent 0%, transparent 66%, rgba(0, 196, 90, .08) 66%, rgba(0, 196, 90, .08) 73%, transparent 73%);
}

.page-about .ab-capability__layout {
  display: grid;
  gap: 36px;
  margin-top: 44px;
}

.page-about .ab-capability__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .ab-stat {
  background: var(--c-dark-gray);
  border-left: 4px solid var(--c-green);
  padding: 24px 18px;
  min-width: 0;
}

.page-about .ab-stat--hot {
  border-left-color: var(--c-yellow);
}

.page-about .ab-stat__num {
  display: block;
  font-size: clamp(22px, 5.6vw, 34px);
  line-height: 1.12;
  font-weight: 700;
  color: var(--c-green);
  margin-bottom: 6px;
  word-break: keep-all;
}

.page-about .ab-stat--hot .ab-stat__num {
  color: var(--c-yellow);
}

.page-about .ab-stat__label {
  font-size: 13px;
  color: var(--c-gray);
  line-height: 1.5;
}

.page-about .ab-capability__media {
  border: 1px solid rgba(0, 196, 90, .3);
  padding: 8px;
  background: var(--c-dark-gray);
}

.page-about .ab-capability__img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .ab-capability__notes {
  font-size: 14px;
  line-height: 1.85;
}

.page-about .ab-capability__notes p {
  margin: 0 0 12px;
}

.page-about .ab-capability__link {
  color: var(--c-yellow);
  text-decoration: underline;
  text-decoration-color: var(--c-deep-green);
  text-underline-offset: 4px;
  transition: color .2s ease, background .2s ease;
}

.page-about .ab-capability__link:hover {
  background: var(--c-yellow);
  color: var(--c-dark);
  text-decoration: none;
}

/* 团队构成 */
.page-about .ab-team {
  padding: 76px 0 96px;
}

.page-about .ab-team__grid {
  display: grid;
  gap: 16px;
  margin-top: 44px;
}

.page-about .ab-team-card {
  position: relative;
  background: var(--c-dark-gray);
  border: 1px solid rgba(0, 196, 90, .25);
  padding: 30px 24px;
  transition: border-color .3s ease, transform .3s ease, background .3s ease;
}

.page-about .ab-team-card:hover {
  border-color: var(--c-green);
  transform: translateY(-4px);
  background: rgba(0, 196, 90, .05);
}

.page-about .ab-team-card--highlight {
  border-color: var(--c-yellow);
}

.page-about .ab-team-card--highlight:hover {
  border-color: var(--c-yellow);
  background: rgba(223, 255, 0, .05);
}

.page-about .ab-team-card__num {
  display: block;
  font-size: 52px;
  line-height: 1;
  font-weight: 700;
  color: var(--c-green);
  margin-bottom: 14px;
}

.page-about .ab-team-card--highlight .ab-team-card__num {
  color: var(--c-yellow);
}

.page-about .ab-team-card__title {
  font-family: var(--font-head);
  font-size: 20px;
  color: var(--c-pale);
  margin: 0 0 10px;
  letter-spacing: .03em;
}

.page-about .ab-team-card__text {
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
}

.page-about .ab-team__foot {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--c-deep-green);
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.page-about .ab-team__foottext {
  font-size: 13px;
  line-height: 1.8;
  margin: 0;
}

.page-about .ab-team__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-green);
  border: 1px solid var(--c-green);
  padding: 9px 18px;
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}

.page-about .ab-team__link:hover {
  background: var(--c-green);
  color: var(--c-dark);
}

/* 桌面端布局 */
@media (min-width: 900px) {
  .page-about .ab-story__grid {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 80px;
    align-items: center;
  }

  .page-about .ab-hero__meta {
    grid-template-columns: repeat(3, 200px);
    gap: 20px;
  }

  .page-about .ab-timeline-wrap {
    display: grid;
    grid-template-columns: 1.35fr 0.9fr;
    gap: 64px;
    align-items: start;
  }

  .page-about .ab-timeline-figure {
    position: sticky;
    top: 120px;
    margin-top: 0;
  }

  .page-about .ab-capability__layout {
    grid-template-columns: 1fr 0.85fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-capability__notes {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 40px;
    max-width: 72em;
  }

  .page-about .ab-capability__notes p {
    margin: 0;
  }

  .page-about .ab-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .ab-team__foot {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px 24px;
  }

  .page-about .ab-team__foottext {
    flex: 1 1 100%;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-team__foottext {
    flex: 1 1 auto;
    max-width: 780px;
  }
}